SAO PAULO (AP) - A huge underground river appears to be flowing thousands of feet beneath the Amazon River, Brazilian scientists said Thursday.Valiya Hamza of Brazil's National Observatory said researchers found indications the subterranean river is 3,700 miles (6,000 kilometers) long, about the same length as the Amazon on the surface.Hamza said the discovery of the possible underground river came from studying temperature variations at 241 inactive oil wells drilled in the 1970s and 1980s by Brazil's state-run oil company, Petrobras.He said the "thermal information" provided by Petrobras allowed his team of researchers to identify the movement of water 13,100 feet (4,000 meters) under the Amazon River.

SAO PAULO (AP) - A huge underground river appears to be flowing thousands of feet beneath the Amazon River, Brazilian scientists said Thursday.Valiya Hamza of Brazil's National Observatory said researchers found indications the subterranean river is 3,700 miles (6,000 kilometers) long, about the same length as the Amazon on the surface.Hamza said the discovery of the possible underground river came from studying temperature variations at 241 inactive oil wells drilled in the 1970s and 1980s by Brazil's state-run oil company, Petrobras.He said the "thermal information" provided by Petrobras allowed his team of researchers to identify the movement of water 13,100 feet (4,000 meters) under the Amazon River.